Posted by ScottyHOMEy on March 16, 2009 at 08:46:52 from (70.105.234.113):
In Reply to: Re: Carburetor posted by Farmall Bob on March 16, 2009 at 08:20:59:
If you do go to replacement, a Zenith 14007 is pretty much the standard for the 113/123 motors, and commonly available.
AS fara Hendrik's very clever idea, he's just substituting an open bowl for the regular closed-up bowl on the carb. Mount the carb to a board long enough to stradle the bowl. Run gas down to the carb, let it run until it lifts the float, and then monitor the level of the gas in the bowl to determine whether the needle is closing off the gas properly.
Coining is basically smacking metal with a punch or other tool of the right size and shape to make a seat for whatever it is that has to fit into the seat. So if the needle has a 45* angle, you would grind and polish a punch to a 45* angle, then give the seat for the needle a couple of good tunks with the punch to make sure it is the correct angle (I almost said right angle, which isn't 45*) for the needle to seat and to knock down any burrs, etc., that could be keeping the needle from seating. Very important to have everything -- tool and seat both -- good and clean before doing this.
Never considered or tried it or even heard of it, but I suppose with a drill press to keep things straight and at very low speeds, you could try lapping a steel needle in, as long as you cleaned things up well afterwards.
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